A representative sample reflects the true composition and physical condition of the process at the defined measurement point.
How representativeness is lost
Representativeness can be lost through condensation, contamination, adsorption, time delay, poor routing, poor probe location, or inappropriate pressure reduction.
Why analyser precision is not enough
An analyser can produce highly repeatable results on a sample that is no longer representative. Precision does not guarantee relevance.
Why the full chain matters
Sampling, conditioning, transport, and analysis form one chain. Weakness in any link reduces measurement credibility.
Why this is a commercial issue
In gas measurement and quality work, unrepresentative sampling can affect operating decisions, reporting confidence, and commercial outcomes.
